Aqueous film-forming foam extinguishant with high stability

Abstract

An aqueous film-forming foam extinguishant with high stability belongs to the technical field of fire service inventory and comprises the following components by mass percent: 1.2-3.0% of a fluorocarbon surfactant, 0.5-1.5% of a fluorine-free surfactant, 1.5-3.5% of perfluorbetaine, 2-5% of fluorinated lauryl betaine, 3-5% of urea, 5-15% of sodium alpha-olefin sulfonate, 10-15% of lauryl sodium sulfate, 10-16% of alkyl glycoside, 10-20% of glycol, 0.1-0.3% of xanthan gum, 0.5-1.0% of a foam stabilizer, 0.8-1.5% of a cosolvent, 0.1-1.2% of a thickener and the balance of water. The aqueous film-forming foam extinguishant with high stability is scientific in component, and compared with a traditional aqueous film-forming foam extinguishant, has favorable hydrophobicity and oleophobic propertyand very low surface tension; a thin film can be formed when generated foam covers a burning oil surface, and the thin film tightly covers the oil surface to play a fire smothering role; the aqueousfilm-forming foam extinguishant with high stability has a strong high temperature resisting function; the formed thin film has extremely high stability; the temperature reduction speed is high; the probability of after-combustion is low; the use is stable; and therefore, the fire extinguishing speed is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of fire-fighting supplies, and relates to a foam fire extinguishing agent, in particular to an aqueous film-forming foam fire extinguishing agent with high stability. Background technique [0002] Foam fire extinguishing agent is an effective fire extinguishing agent for extinguishing flammable and combustible liquids. It mainly generates a condensed foam floating layer on the surface of the liquid to suffocate and cool. Foam fire extinguishing agents are divided into chemical foam, air foam, fluoroprotein foam, aqueous film-forming foam and alcohol-resistant foam. [0003] Foam fire extinguishing agent generally consists of foaming agent, foam stabilizer, viscosity reducer, antifreeze agent, cosolvent, preservative and water. Aqueous film-forming foam fire extinguishing agent is also called light water foam fire extinguishing agent or fluorine chemical foam fire extinguishing agent, abbreviated as AFFF in ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the existing aqueous film-forming foam fire extinguishing agent, the thickness of the fire extinguishing agent cannot reach the coverage, the cooling speed is too slow, the fire extinguishing speed is slow, the fire extinguishing effect is poor, it is easy to recombust, and the stability performance is poor, etc., and proposes a high stability performance The aqueous film-forming foam fire extinguishing agent can solve the deficiencies in the above-mentioned prior art, can enhance the film thickness of the fire extinguishing agent, is stable in use, and can increase the speed of fire extinguishing